Dandelion Yellow Item ID (Versions 1.12.2 and Below)

When Minecraft updated to version 1.13, a changed dubbed "The Flattening" was introduced. In "The Flattening", numerical IDs and item data was removed, and some item IDs were changed to make them more logical - Dandelion Yellow was one of the many items that had their IDs changed.

For this reason, if you're playing on a Minecraft version below 1.13 (1.12, 1.8, 1.7), you should use what we've named a legacy ID for this item. The legacy ID for dandelion yellow is:

Dandelion Yellow has a data value of 11. You will need to add this to commands, along with its legacy item ID (below), to spawn it.